CN215634798U - Inter-axle differential structure and through bridge - Google Patents

Abstract

The utility model belongs to the technical field of automobile axles and discloses an inter-axle differential structure and a through axle. This differential structure between axle includes the input shaft, is equipped with the shaft shoulder at the outer wall epirelief of input shaft, and the cover is equipped with on the input shaft: a planet carrier connected to the input shaft; one end of the sun wheel is abutted against the end face of the planet carrier, and the other end of the sun wheel is connected to the through shaft; the planet wheel shaft penetrates through the planet carrier and is meshed with the sun gear; the gear ring and the sun gear are respectively arranged on two sides of the planet carrier, the internal tooth of the gear ring is meshed with one end, far away from the sun gear, of the planet gear shaft, the external tooth of the gear ring is meshed with the output gear, the gear ring is internally provided with an unthreaded hole along the axial direction of the gear ring, a shaft neck is convexly arranged on the end face of the planet carrier, the shaft neck penetrates through the unthreaded hole and abuts against a shaft shoulder of the input shaft, and the gear ring can rotate relative to the planet carrier; the sliding sleeve is configured to be slidable relative to a shoulder of the input shaft and selectively connected to the ring gear. The inter-axle differential structure can reduce the axial dimension and reduce the abrasion.

Description

Inter-axle differential structure and through bridge

Technical Field

The utility model relates to the technical field of automobile axles, in particular to an inter-axle differential structure and a through axle.

Background

The inter-axle differential structure between the through axle shafts in the commercial vehicle with the double drive axles is an important transmission mechanism, and realizes the differential function of the middle and rear axles while transmitting torque. The reliability of the inter-axle differential structure between the through axle shafts plays a key role in the service life of the drive axle, and the reliability of the whole vehicle is directly influenced.

In a domestic automobile driving axle, an inter-axle differential structure of a through axle mostly adopts a traditional bevel gear structure, and in the structure, the torque of an input shaft is averagely distributed to bevel gears on two sides through planetary gears. Because the gear transmission process needs to be rotated frequently, in order to avoid abrasion between the gear and the gear shaft, a sleeve needs to be arranged between the gear and the gear shaft, but the number of parts is increased invisibly, and the difficulty of assembling time is increased. In addition, in order to ensure a good transmission effect, all parts are sequentially arranged along the axial direction, and the axial space is large, so that the whole structure is heavy, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an inter-axle differential structure and a through bridge, which have the advantages of simplified structure, small occupied space and lower production cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an inter-axle differential structure, includes the input shaft the outer wall epirelief of input shaft is equipped with the shaft shoulder the cover is equipped with on the input shaft:

a carrier connected to the input shaft;

one end of the sun gear is abutted against the end face of the planet carrier, and the other end of the sun gear is connected to the through shaft;

the planet wheel shaft penetrates through the planet carrier and is meshed with the sun gear;

the gear ring and the sun gear are respectively arranged on two sides of the planet carrier, the inner tooth of the gear ring is meshed with one end, far away from the sun gear, of the planet gear shaft, the outer tooth of the gear ring is meshed with an output gear, an unthreaded hole is formed in the gear ring along the axial direction of the gear ring, a shaft neck is arranged on the end face of the planet carrier in a protruding mode, the shaft neck penetrates through the unthreaded hole and abuts against a shaft shoulder of the input shaft, and the gear ring can rotate relative to the planet carrier;

a sliding sleeve gear configured to be slidable relative to the shoulder of the input shaft and selectively connected to the ring gear.

Preferably, a first connecting groove is formed in the sun gear, a limit ring table is convexly arranged on the outer wall of the input shaft, and the groove bottom of the first connecting groove abuts against the limit ring table of the input shaft.

Preferably, a first spline hole is formed in the planet carrier, a first external spline is convexly arranged on the outer wall of the input shaft, and the first external spline is clamped in the first spline hole.

Preferably, a through hole is formed in the planet carrier, the through hole and the first spline hole are coaxial and are communicated with each other, and the input shaft penetrates through the through hole.

Preferably, the gear ring further comprises a gasket, and two sides of the gasket are respectively abutted to the shaft shoulder and the gear ring.

Preferably, a receiving hole is provided on a side of the ring gear away from the carrier, and the receiving hole is used for receiving the gasket.

Preferably, the planet wheel shaft comprises a main shaft, first gear teeth and second gear teeth, the main shaft penetrates through the planet carrier and can rotate relative to the planet carrier, the first gear teeth are arranged on the outer wall of one end of the main shaft, the second gear teeth are arranged on the outer wall of the other end of the main shaft, the first gear teeth are meshed with the sun wheel, and the second gear teeth are meshed with the inner tooth form of the gear ring.

Preferably, the planetary gear set further comprises a needle bearing, and the needle bearing is sleeved on the main shaft and located between the main shaft and the planet carrier.

Preferably, a fixing groove is provided in an outer wall of the sun gear, a snap ring is provided in the fixing groove, and the planetary wheel shaft is capable of coming into contact with the snap ring.

In order to achieve the purpose, the utility model further provides a through bridge which comprises a box body and the inter-axle differential structure, wherein the inter-axle differential structure is arranged in the box body.

The utility model has the beneficial effects that:

the inter-axle differential structure provided by the utility model has the advantages that the torque power is input by the input shaft, the input shaft is connected with the planet carrier, the input shaft drives the planet carrier to rotate, the planet wheel shaft is driven to rotate along with the rotation of the planet carrier, the planet wheel shaft is respectively meshed with the gear ring and the sun gear, finally, the power is transmitted to the sun gear and the gear ring, and the sun gear and the gear ring form two output ends. By arranging the sliding gear sleeve between the input shaft and the gear ring, if the sliding gear sleeve moves towards the direction close to the gear ring and is connected with the gear ring, the input shaft and the gear ring are connected into a whole, the inter-shaft differential structure is in a locking state, the sun gear and the gear ring run at the same speed, and the torque is evenly distributed to the sun gear and the gear ring; if the sliding gear sleeve moves towards the direction far away from the gear ring and is separated from the gear ring, the interaxial differential structure is in a differential function, and the interaxial differential structure can distribute torque to the sun gear and the gear ring according to a certain proportion according to the transmission principle of the planetary gear train, so that the function of torque-variable output is realized.

Compared with the prior art that the planet carrier and the gear ring have a certain distance, the shaft neck is arranged on the planet carrier and can penetrate through the gear ring, so that the axial sizes of the gear ring and the planet carrier are effectively reduced, the occupied space is saved, the space arrangement is convenient, and the whole weight of the whole inter-axle differential structure is reduced. Simultaneously, through being provided with the axle journal between input shaft and ring gear, the axle journal has played the effect of keeping apart input shaft and ring gear, avoids appearing wearing and tearing the condition because of relative rotation between input shaft and the ring gear, has prolonged the life of ring gear and input shaft, simultaneously the ring gear can for the planet carrier rotates, and the axle journal is equivalent to telescopic effect, and the planet carrier unites two into one planetary drive and telescopic function, and a thing is multi-purpose, and the functionality is stronger, and need not more part, saves the time and the degree of difficulty of assembly.

The embodiment also provides a through bridge, which comprises a box body and the inter-axle differential structure, wherein the inter-axle differential structure is arranged in the box body. The box provides accommodation space for the inter-axle differential structure, has played the effect of protection inter-axle differential structure, and the inter-axle differential structure can realize the differential function, guarantees the reliability of whole car.

Drawings

FIG. 1 is a schematic structural view of an interaxle differential structure of the present invention;

FIG. 2 is a schematic view of the construction of the carrier in the interaxial differential construction of the present invention;

FIG. 3 is a schematic view of the construction of the planet axle in the interaxle differential structure of the present invention;

FIG. 4 is a schematic view of the sun gear in the inter-axle differential configuration of the present invention;

fig. 5 is a schematic structural view of a ring gear in the inter-axle differential structure of the utility model.

In the figure:

1. an input shaft; 2. a planet carrier; 3. a sun gear; 4. a planetary wheel shaft; 5. a ring gear; 6. a sliding gear sleeve; 7. a snap ring; 8. a gasket; 9. a needle bearing; 100. a front bearing; 200. a rear bearing;

11. a shaft shoulder;

21. a through hole; 22. a first splined bore; 23. a journal;

31. a second spline hole; 32. a circular hole; 33. sun gear teeth; 34. fixing grooves; 35. a first connecting groove;

41. a main shaft; 42. a first gear tooth; 43. a second gear tooth;

51. an inner tooth shape; 52. an outer tooth shape; 53. an accommodation hole; 54. a light hole; 55. and (4) face teeth.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment provides an inter-axle differential structure, as shown in fig. 1, the inter-axle differential structure includes an input shaft 1, a planet carrier 2, a sun gear 3, a planet wheel shaft 4, a gear ring 5 and a sliding gear sleeve 6, the input shaft 1 is an input end of power, the sliding gear sleeve 6, the gear ring 5, the planet carrier 2 and the sun gear 3 are sequentially sleeved on the input shaft 1, and the input shaft 1 plays a role in supporting. One end of the sun gear 3 is abutted against the end face of the planet carrier 2, the other end of the sun gear 3 is connected with the through shaft, and the other end of the sun gear 3 is one of the power output ends. The planet carrier 2 is connected with the input shaft 1, the fixing effect of the planet carrier 2 is good, the planet carrier 2 is used for bearing a planet wheel shaft 4, the planet wheel shaft 4 penetrates through the planet carrier 2, and the planet wheel shaft 4 is meshed with the sun gear 3. The two sides of the planet carrier 2 are respectively provided with a gear ring 5 and a sun gear 3, the inner tooth form 51 of the gear ring 5 is meshed with one end of the planet gear shaft 4 far away from the sun gear 3, the outer tooth form 52 of the gear ring 5 is meshed with an output gear, and the outer tooth form 52 of the gear ring 5 is the other power output end.

In the inter-axle differential structure provided by the embodiment, torque power is input through the input shaft 1, the input shaft 1 is connected to the planet carrier 2, the input shaft 1 drives the planet carrier 2 to rotate, the planet carrier shaft 4 is driven to rotate along with the rotation of the planet carrier 2, the planet carrier shaft 4 is respectively engaged with the gear ring 5 and the sun gear 3, finally, the power is transmitted to the sun gear 3 and the gear ring 5, and the sun gear 3 and the gear ring 5 form two output ends. By providing the sliding sleeve gear 6 between the input shaft 1 and the ring gear 5, if the sliding sleeve gear 6 is moved in a direction close to the ring gear 5 and connected to the ring gear 5 to connect the input shaft 1 and the ring gear 5 as a whole, the inter-shaft differential structure is in a locked state, the sun gear 3 and the ring gear 5 run at the same speed, and the torque is equally distributed to the sun gear 3 and the ring gear 5; if the sliding gear sleeve 6 moves towards the direction far away from the gear ring 5 and is separated from the gear ring 5, the interaxial differential structure is in a differential function, and the interaxial differential structure can distribute torque to the sun gear 3 and the gear ring 5 according to a certain proportion according to the transmission principle of the planetary gear train, so that the function of torque-variable output is realized.

Further, as shown in fig. 1 and 2, in order to ensure the fixing effect between the input shaft 1 and the planet carrier 2, a first spline hole 22 is arranged in the planet carrier 2 along the axial direction thereof, and a first external spline is convexly arranged on the outer wall of the input shaft 1 and is clamped in the first spline hole 22. The planet carrier 2 and the input shaft 1 are in spline fit, so that the power of the input shaft 1 is stably transmitted to the planet carrier 2.

The end surface of the planet carrier 2 close to one end of the sun gear 3 is abutted against the side surface of the sun gear 3, so that the spacing between the planet carrier 2 and the sun gear 3 is realized. The end surface of the planet carrier 2 far away from the end surface of the sun gear 3 is convexly provided with a shaft neck 23, the ring gear 5 is internally provided with a unthreaded hole along the axial direction, and the shaft neck 23 passes through the unthreaded hole 54 and abuts against the shaft shoulder 11 of the input shaft 1, so that the ring gear 5 can rotate relative to the planet carrier 2.

Compared with the prior art that the planet carrier 2 and the gear ring have a certain distance, the shaft neck 23 is arranged on the planet carrier 2 and can penetrate through the gear ring 5, so that the axial sizes of the gear ring 5 and the planet carrier 2 are effectively reduced, the occupied space is saved, the space arrangement is convenient, and the whole weight of the whole inter-axle differential structure is reduced. Simultaneously, through being provided with axle journal 23 between input shaft 1 and ring gear 5, axle journal 23 has played the effect of keeping apart input shaft 1 and ring gear 5, has avoided appearing the condition of wearing and tearing because of relative rotation between input shaft 1 and the ring gear 5, has prolonged ring gear 5 and input shaft 1's life, simultaneously ring gear 5 can for planet carrier 2 rotates, and axle journal 23 is equivalent to telescopic effect, and planet carrier 2 unites two into one planetary drive and telescopic function, and a thing is multi-purpose, and the functionality is stronger, and need not more part, saves the time and the degree of difficulty of assembly.

Further, a through hole 21 is formed in the planet carrier 2, and the planet wheel shaft 4 penetrates through the through hole 21, so that the planet wheel shaft 4 is installed. It should be noted that a plurality of through holes 21 are uniformly formed in the planet carrier 2 along the circumferential direction thereof, and a plurality of planet wheel shafts 4 are respectively arranged in the plurality of through holes 21 in a penetrating manner, so as to ensure a good transmission effect.

As shown in fig. 1 to 3, the planetary gear shaft 4 includes a main shaft 41, a first gear 42 and a second gear 43, the main shaft 41 is a cylindrical structure, the main shaft 41 penetrates through the planetary carrier 2 and can rotate relative to the planetary carrier, the main shaft 41 supports and is provided with the first gear 42 on an outer wall of one end of the main shaft 41, the second gear 43 is provided on an outer wall of the other end of the main shaft 41, the first gear 42 and the second gear 43 are both specifically cylindrical teeth, the first gear 42 is engaged with the sun gear 3, and the second gear 43 is engaged with the ring gear 5. By providing the first gear teeth 42 and the second gear teeth 43, the main shaft 41 is driven to rotate by the power transmitted from the input shaft 1 by the planet carrier 2, so that the power is transmitted to the sun gear 3 through the first gear teeth 42 and transmitted to the ring gear 5 through the second gear teeth 43.

Optionally, the inter-axle differential structure further includes a needle bearing 9, the needle bearing 9 is disposed in the through hole 21, and the needle bearing 9 is sleeved on the main shaft 41 and located between the main shaft 41 and the planet carrier 2. The outer ring of the needle bearing 9 is matched with the inner wall of the through hole 21, and the inner ring of the needle bearing 9 is matched with the outer wall of the main shaft 41, so that the smoothness of the rotation of the main shaft 41 is ensured, and the phenomenon of rotation clamping stagnation is avoided.

Alternatively, since the planet carrier 2 is fixedly arranged relative to the input shaft 1, in order to ensure the transmission effectiveness and stability of the planet shaft 4, as shown in fig. 1 to 4, the inter-shaft differential structure further comprises a snap ring 7, a fixing groove 34 is arranged on the outer wall of the sun gear 3, the snap ring 7 is arranged in the fixing groove 34, and the first gear teeth 42 of the planet shaft 4 are engaged with the sun gear 3 and abut against the snap ring 7. By adopting the arrangement, the end face of one end of the planet wheel shaft 4 is abutted against the gear ring 5, and the end face of the other end is abutted against the snap ring 7, so that the two ends of the planet wheel shaft 4 can be well axially limited, and the fixing effect is good.

As shown in fig. 4, the sun gear 3 has a shape similar to a T-shaped structure, a large opening end of the sun gear 3 is disposed toward the planet carrier 2, and a small opening end of the sun gear 3 is disposed toward the through shaft. The outer wall of the big opening end of the sun gear 3 is provided with a sun gear 33, the sun gear 33 is meshed with the first gear 42 of the planet wheel shaft 4, and the sun gear 33 is provided with a fixing groove 34 with an annular structure for accommodating and fixing the snap ring 7. A circular hole 32 is formed in the sun gear 3 along the axial direction thereof, and the input shaft 1 is provided with the circular hole 32 so that the sun gear 3 can rotate relative to the input shaft 1.

One side of the big opening end of the sun gear 3, which is close to the planet carrier 2, is a first limiting end surface which is abutted against the end surface of the planet carrier 2, so that good limiting between the planet carrier 2 and the sun gear 3 is ensured.

Be provided with first connecting groove 35 in the inside of the macrostoma end of sun gear 3, the diameter of first connecting groove 35 is greater than the diameter of round hole 32 and coaxial setting to form the shoulder hole structure, the tank bottom of first connecting groove 35 is the spacing terminal surface of second, corresponds the protruding spacing ring platform that is equipped with of the spacing terminal surface of second at the outer wall of input shaft 1, the spacing terminal surface butt of second in the spacing ring platform of input shaft 1, in order to guarantee well spacing between input shaft 1 and the sun gear 3.

The inner wall of the small opening end of the sun gear 3 is provided with a second spline hole 31, the outer wall of the through shaft is provided with a second external spline, and the second external spline is clamped in the second spline hole 31. The sun gear 3 and the through shaft are in spline fit with each other, so that the power of the sun gear 3 is stably transmitted to the through shaft.

As shown in fig. 5, an aperture 54 is provided in the ring gear 5 along the axial direction thereof, the journal 23 of the carrier 2 passes through the aperture 54, the ring gear 5 is allowed to rotate relative to the carrier 2, the end surface of the ring gear 5 on the side close to the carrier 2 abuts against the side surface of the carrier 2, the both ends of the carrier 2 are restricted by the ring gear 5 and the sun gear 3, and the positional stability is good.

In order to further ensure the effectiveness and stability of transmission, as shown in fig. 1 and 5, the inter-axle differential structure further comprises a gasket 8, a shoulder 11 is convexly arranged on the outer wall of the input shaft 1, the gasket 8 is arranged between the gear ring 5 and the shoulder 11, two sides of the gasket 8 are respectively abutted against the shoulder 11 and the gear ring 5, so that the limitation on one side of the gear ring 5 is realized, the other side of the gear ring 5 is abutted against the planet wheel shaft 4, and therefore the two ends of the gear ring 5 can be ensured to be well axially limited, and the fixing effect is good. Preferably, an accommodating hole 53 is formed in the side, away from the planet carrier 2, of the ring gear 5, the accommodating hole 53 is used for accommodating the gasket 8, the accommodating hole 53 provides an accommodating space for the gasket 8, and the gasket 8 is fixed effectively.

An inner tooth form 51 is arranged on one side of the gear ring 5 close to the planet carrier 2, the inner tooth form 51 is meshed with the second gear teeth 43 of the planet shaft 4 to transmit the power of the planet shaft 4 to the gear ring 5, an outer tooth form 52 is arranged on the outer wall of the gear ring 5, and the outer tooth form 52 is meshed with an output gear to realize the power output of the gear ring 5.

The side of the gear ring 5, which is far from the planet carrier 2, is provided with end face teeth 55, and the end face teeth 55 can be meshed with the sliding gear sleeve 6 to realize the locking or differential function of the inter-axle differential structure.

The embodiment also provides a through bridge, which comprises a box body and the inter-axle differential structure, wherein the inter-axle differential structure is arranged in the box body. The box provides accommodation space for the differential structure between the axle, has played the effect of protection differential structure between the axle.

Further, as shown in fig. 1, the through bridge further includes a front bearing 100, and the front bearing 100 is sleeved on the input shaft 1 and is disposed between the input shaft 1 and the box body, so as to ensure the smooth rotation of the input shaft 1 and avoid the occurrence of rotation jamming.

Further, this link up bridge still includes rear bearing 200, and rear bearing 200 cover is located on sun gear 3 and is set up between sun gear 3 and box to guarantee sun gear 3's rotation smoothness nature, avoid appearing the condition of rotation jamming, the differential function can be realized to the inter-axle differential structure, guarantees the reliability of whole car.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. The utility model provides an inter-axle differential structure, includes input shaft (1) the outer wall epirelief of input shaft (1) is equipped with shaft shoulder (11), its characterized in that the cover is equipped with on input shaft (1):

a carrier (2) connected to the input shaft (1);

a sun wheel (3), one end of the sun wheel (3) is abutted against the end face of the planet carrier (2), the other end is connected with the through shaft,

the planet wheel shaft (4) penetrates through the planet carrier (2), and the planet wheel shaft (4) is meshed with the sun gear (3);

the gear ring (5), the gear ring (5) and the sun gear (3) are respectively arranged on two sides of the planet carrier (2), an internal tooth profile (51) of the gear ring (5) is meshed with one end, far away from the sun gear (3), of the planet carrier shaft (4), an external tooth profile (52) of the gear ring (5) is meshed with an output gear, a unthreaded hole (54) is formed in the gear ring (5) along the axial direction of the gear ring, a shaft neck (23) is convexly arranged on the end face of the planet carrier (2), the shaft neck (23) penetrates through the unthreaded hole (54) and abuts against a shaft shoulder (11) of the input shaft (1), and the gear ring (5) can rotate relative to the planet carrier (2);

a sliding sleeve gear (6), the sliding sleeve gear (6) being configured to be slidable relative to the shoulder (11) of the input shaft (1) and selectively connected to the ring gear (5).

2. The interaxial differential structure according to claim 1, wherein a first connecting groove (35) is provided inside the sun gear (3), a limit ring land is provided protruding from an outer wall of the input shaft (1), and a groove bottom of the first connecting groove (35) abuts against the limit ring land of the input shaft (1).

3. An interaxial differential structure according to claim 1, wherein a first splined hole (22) is formed in the carrier (2), and a first external spline is protruded on an outer wall of the input shaft (1), and the first external spline is engaged with the first splined hole (22).

4. An inter-axle differential structure according to claim 3, characterized in that a through hole is provided in the carrier (2), the through hole and the first splined hole (22) being coaxial and communicating with each other, the input shaft (1) passing through the through hole.

5. An interaxial differential structure according to claim 1, further comprising a spacer (8), both sides of the spacer (8) abutting against the shoulder (11) and the ring gear (5), respectively.

6. An inter-axle differential structure according to claim 5, characterized in that a receiving hole (53) is provided in a side of the ring gear (5) remote from the carrier (2), the receiving hole (53) being for receiving the spacer (8).

7. An interaxial differential structure according to claim 1, wherein the planet wheel shaft (4) comprises a main shaft (41), a first gear (42) and a second gear (43), the main shaft (41) is arranged through the planet carrier (2) and can rotate relative to the planet carrier, the first gear (42) is arranged on the outer wall of one end of the main shaft (41), the second gear (43) is arranged on the outer wall of the other end of the main shaft, the first gear (42) is meshed with the sun wheel (3), and the second gear (43) is meshed with the inner tooth form (51) of the ring gear (5).

8. An interaxial differential structure according to claim 7, further comprising a needle bearing (9), wherein the needle bearing (9) is sleeved on the main shaft (41) and is located between the main shaft (41) and the planet carrier (2).

9. An inter-axle differential structure according to claim 7, characterized in that a fixing groove (34) is provided on an outer wall of the sun gear (3), a snap ring (7) is provided in the fixing groove (34), and the planetary wheel shaft (4) is contactable with the snap ring (7).

10. A through axle comprising a case and the inter-axle differential structure according to any one of claims 1 to 9, said case having said inter-axle differential structure disposed therein.

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